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Publications (19)
A definição de tipos de massas de água é uma etapa fundamental do processo de avaliação ecológica preconizado pela Directiva-Quadro da Água (DQA). Só assim é viável definir situações de referência e, comparativamente, classificar o estado ecológico de cada tipo de rio. A necessidade de produzir e aplicar índices piscícolas no âmbito da implementaçã...
A ictiofauna de 140 locais de referência foi estudada através de uma abordagem multivariada,
baseada na estrutura das comunidades piscícolas. A amostragem por pesca eléctrica decorreu durante
a Primavera de 2004. Foram utilizados os dados taxonómicos e várias métricas relativas aos peixes,
como a riqueza e diversidade específicas, a abundância, e g...
The increase of urban areas and their infrastructure network is homogenizing the landscape and threatening biodiversity and ecosystems functions and services. Wildflower meadows have a high biodiversity value and can prosper in degraded areas dominated by nitrophilous species, making them suitable to be used in peri-urban and urban areas to promote...
Many river networks in southern Europe are intermittent. In summer, the surface flow is zero and many streams become isolated pools. In this study, 128 dry season pools were studied covering first- to fourth-order streams on the Degebe River network (south Portugal). The aim of the study was to identify pool types based on environmental drivers and...
Invasive species have the potential to impact native fish through interference competition, which is especially concerning for the conservation of the valuable endemic ichtyofauna of the Iberian Peninsula. This study investigated the potential negative effect of the invasive bleak Alburnus alburnus on the behaviour of the critically endangered Iber...
Southern Europe has been shaped by human activity and maintained by traditional practices of land use for centuries. In the last decades a rather accelerated intensification of agricultural systems was observed, with consequent environmental effects. This study aimed to evaluate the effects of agricultural land use in two small-medium river basins...
Background. Freshwater fishes are among the most threatened taxa worldwide. The proliferation of introduced species in the Iberian Peninsula is currently one of the main drivers of native fish declines. One of such species, the bleak, Alburnus alburnus (Linnaeus, 1758), has become widespread in the last 25 years and, due to its phylogenetic proximi...
The Iberian Peninsula has been subjected to numerous fish introductions and the colonization of new areas by non-native species is constantly reported. However, there is a lack of knowledge about many aspects of the bio-ecology of these species and their invasive success within the environmental context of Mediterranean temporary rivers. This study...
Mediterranean temporary streams show high spatial and temporal heterogeneity. Native fish species are adapted to this natural variability, but the cumulative effect of natural and anthropogenic disturbances may compromise the stability and persistence of fish assemblages. This study aimed to determine if environmental drivers affect the response of...
Invasive species are regarded as a biological pressure to natural aquatic communities. Understanding the factors promoting successful invasions is of great conceptual and practical importance. From a practical point of view, it should help to prevent future invasions and to mitigate the effects of recent invaders through early detection and priorit...
Southern Portugal is experiencing a rapid change in land use due to the spread of intensive farming systems, namely olive production systems, which can cause strong negative environmental impacts and affect the ecological integrity of aquatic ecosystems. This study aimed to identify the main environmental disturbances related with olive grove inten...
The use of river-types is of practical value, serving as groups for which
assessment procedures can be developed and applied. An abiotic
typology was set by the Portuguese Water Agency, mainly based on 6
major morphoclimatic regions. However, to be biologically meaningful,
this typology should fit the distribution patterns of the biological
quality...
Este estudo sobre a Ribeira do Almansor associa a Universidade de Évora - Instituto do Mar, o Instituto Superior Técnico e o Instituto da Água em resposta a uma solicitação do então IHERA - Instituto de Hidráulica e Engenharia Rural e Ambiente, posteriormente IDRHa - Instituto de Desenvolvimento Rural e Hidráulica e DGADR –Direcção-Geral de Agricul...
Streams in mediterranean-type climate regions are shaped by predictable seasonal events of flooding and drying over an annual cycle, but also present a strong interannual flow variation.
The Guadiana River is one of the most important rivers in the Iberian Peninsula. The fish fauna presents 11 native freshwater species, including eight with high co...
